you could try to create an ogg vorbis live-stream, which you set as your startup sound. Don't ask me how to do it...
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the_SeppiDec 28 '13 at 12:51

You can probably do something using a pipe - have a program connect to the radio stream and output to a named pipe (instead of your audio device). Then connect to that named pipe with your audio player, or in this case, the start-up sound playing code.
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Aaron DDec 28 '13 at 13:08

Hmm.. I'm not sure I know what you both mean, it'll require some googleing on my part, but thanks for suggestions, I'll study them!
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loostroDec 28 '13 at 16:01